Auxiliary tens-transfer mechanism



May 20, 1952 G. w. HOPKINS ETAL 2,597,487

AUXILIARY TENS-TRANSFER MECHANISM Filed April 19, 1949 '7 Sheets-Sheet lf o O r C) o m C) n U o m J7 m ID m lx N y vg F r :Hm m ll\ @i l 2 o Q,SRE 4 o 10 "r3 ,-13 C f\ J y: l

(D as es FII-:1 1

q* o 0 N v mvENroRs ci? v Gsom W. Horxms BY Jon [ZGkog May 20, 1952 G.w. HoPKlNs ETAI.

AUXILIARY TENS-TRANSFER MECHANISM 7 Sheets-$119.91. 2

Filed April 19, 1949 IN VEN TORS l I I l l l l l I l I Geonac- W. HorxmfJou LGaoaL www@ m2 im@ mv n@ WEP I lvm Afm NllmHl-ILH.

May 20, 1952 G. w. HOPKINS ETAL AUXILIARY TENS-TRANSFER MECHANISM 7Sheets-Sheet 3 Filed April 19, 1949 FIS-5 INVENToRs Geomb W. HoPKmf BYJoN fr. GloL May 20, 1952 G. W. HOPKINS ETAL AUXILIARY TENS-TRANSFERMECHANISM '7 Sheets-Shea?l 4 Filed April 19. 1949 mHLHdw IN VEN TORS ByGEORG:- W. HoRKlNf Jon. bnom.

May 20, 1952 G. w. HOPKINS ETAL 2,597,487

AUXILIARY TENS-TRANSFER MECHANISM Filed April 19, 1949 7 sheets-sheet 5F'I E INVENTORS GEORGE- W. HoPKmf JON E .GaoaL May 20, 1952 G. w.HOPKINS ErAL 2,597,487

G. W. HOPKINS ETAL AUXILIARY TENS-TRANSFER MECHANISM May 20, 1952 '7Sheets-Sheet '7 Filed April 19, 1949 Y INVENTORS GEORGE W. HoPKmf BY JonE. Cmol.'

Patented May 20, 1952 AUXILIARY TENS-TRANSFER MECHANISM George W.Hopkins, San Leandro, and Jon E.

Grobl, Oakland, Calif., assignors to Friden Calculating, Machine Co.,Inc., a corporation of California Application April 19, 1949, Serial No.88,442

13 y Claims. 1

This invention relates to calculating machines and is moreparticularly-concerned with-an improvement in the transfer mechanismsfor the registers offsuch machines.

In certain known types of calculating machines, the register wheelcarriage, when in its initial position, projects beyond the left side ofthe machine due to the factv that the shiftable register must have acapacity which is considerablygreater than that of the actuatormechanism situated Within the main |body portion of the machine. Hence,in calculating machines of the Thomas type wherein the transferactuating mechanism for the register is located in the stationaryF ormain body portion of the machine,

est outboard order thereof has. been lost due to the lack of a mechanismfor effectingk this carry. The operator may then correct the reading ofthe register dials by manually entering the unit ywhich wasflost duringthe calculation.

-Accordingv to thev present invention, this limitation is overcome byproviding an auxiliary 'transfer mechanism in the register wheelcarriage itself which will mechanically effect the transfer of a unitbetween the inboard and outboard orders of the register and alsobetweenr the vario-us outboard orders thereof whereby the operatorneed-have no concern regarding the correctness of the amount indicatedyby the numeral wheels of' the register at the end of the calculation.

This improvement is accomplished byA providing ay coupling means betweenthe highest inboard lorder andthe lowest outboard order and also betweeneach of the outboard orders of the register'which'coupling means isnormally ineffec- Vtive to cause the transfer of a unit from one orderto the'next, but which is rendered operative during a portion of eachcycle of operation of the machine. Means is also provided whereby theauxiliary transfer mechanism will only be rendered operative in thoseorders which lie out board or to the left of. the main transfermechanism so as to prevent any overlapping of the two transfermechanisms as the register Wheel carriage is moved toward the right fromits ini- `tial position. In addition, the auxiliary transfer 2 mechanismis arranged to bedisabled during automatic division operations so as toprevent unnecessary wear and tear on this mechanism which would becaused by the overdraft and corrective cycles which take place duringdivision operations.-

Accordingly, itis an object of the present invention toprovide animproved transfer mechanism for calculating machines of the type havinga register Wheel carriage which shifts relative to the main transfermechanism of the machine, wherein the required transfers betweenadjacent register wheels will be effected in the outboard ordersof theregister as well as in the inboard orders thereof.

Another object of the invention is to provide an auxiliary transfermechanism for the outboard orders of the register which comprises aseries of coupling devices for effectively connecting adjacent orders ofthe register for the transfer of a unit from a lower order Wheel to ahigher order wheel in accordance with the requirements of thecalculation.

Another object of the invention is to provide an auxiliary transfermechanism for the outboard orders of the register which is normallyineffective in the full cycle position of themachine but which isrendered effective for effecting a carry-over between adjacent outboardorder wheels during the latter part of .each machine cycle.

Another object of the` invention is to provide an auxiliary transfermechanismwhich is. normally disabled in the full4 cycle positionv of themachinev and which is conditioned for operation during each machinecycle only in those orders of theregister which lie to theleft of themain transfer mechanism `ofthe machine.

Another object of the invention is to provide an auxiliarytransfermechanism for the outboard order wheels of the register which isadapted to be disabledin its yentirety duringv automatic divisionoperations.

Other objects and advantages will becomeapparent from the/following.'description o f one particular embodiment of the invention illustratedin the accompanying drawings in which:

Fig. 1 is a fragmentaryvlongitudinal sectional View showingtheselecting, actuating, and .transfer mechanisms of a well-known type ofcalculating machine.

Fig, 2 is` a planvew of the left-hand portion of the register wheelcarriage, the carriage cover being removed in this view in order toexpose the auxiliary transfer mechanism.

' shaft 3|. end in a cross bar 32 which is supported between Fig. 3 is asectional view taken along the line 3-3 in Fig. 2.

Fig. 4 is a sectional view taken along the line 4-4 in Fig. 3.

Fig. 5 is a sectional view taken along the line 5-5 in Fig. 3.

Fig. 6 is a sectional view similar to Fig. 5 but with certain partsremoved so as to more clearly illustrate the construction of theauxiliary transfer mechanism.

Fig. '7 is a view of the underneath side of the left end of thecarriage.

Fig. 8 is a plan View of the upper left-hand corner of the calculatingmachine with the carriage removed.

Fig. 9 is a sectional view taken along the line 9-9 in Fig. 8. l

Fig. 10 is a sectional View taken along the line |0|0 in Fig. 9.

Fig. 1l is a sectional view similar` to Fig. 10 but with the parts shownin their various moved positions.

General description In the accompanying drawings, the invention is shownas applied to a calculating machine of the type disclosed in Patent No.2,229,889, issued to Carl M. F. Friden on January 28, 1941. In thismachine, amounts to be entered into the numeral wheels of the shiftableregister are first set up on a keyboard provided with a plurality ofamount keys (Fig. 1) which are mounted for substantially verticalsliding movement in the framework of the machine by means of a pair ofelongated slots 2| formed in each key stem through which pass a pair ofthrough-rods 22 which are supported at either end in the framework ofthe machine. Each key stem 20 is provided with a notch 23 whichcooperates with a latching slide 24 which is adapted to enter the notch23 when the key is depressed so as to retain the key in its depressedposition against the urgency of a return spring 25. Each key stem isprovided at its lower end with a stud 26 which lies immediately above acam face 21 provided on a selector bar 28 which is mounted for endwiseshifting movement in the framework of the machine by means of a pair ofpivoted links 29 (only one shown) Two selector bars 28 are provided foreach row of amount keys, one bar being provided with cam faces 21arranged to lie beneath the studs 26 on vthe 1 to 5 keys while the otherbar 28 is provided with cam faces 21 lying beneath the studs `its rearend with a selector gear 30 which is slidably but non-rotatably mountedon a square This shaft is journalled at its forward the right side frame(not shown) and the left side frame 33 of the machine. At its rear end,the shaft is journalled in a cross bar 34 which,

like the bar 32, is supported between the side frames of the machine.Each selector gear 30 is provided with ten teeth and is arranged tocooperate with a series of differentially stepped teeth 35 provided onan actuator drum 36 mounted on an actuator shaft 31 journalled at itsforward end in the cross bar 32 and-atits rearward end in a cross bar 38which is fastened to the framework of the machine. Mounted on theforward end of the shaft 31 is a bevel gear 39 which meshes with asimilar bevel gear 40 secured to a transverse power shaft 4| journalledbetween the side frames of the machine.

As fully shown and described in the abovenamed Patent No. 2,229,889, thecalculating macnine is provided with an electric motor which is arrangedto drive the shaft 4| in a cyclic manner by means of a suitable clutchmechanism. Hence, the actuator sharts 31 will be given cycles ofoperation and thereby cause the square shaft 3| to be rotated by theactuator drum 36 through one to nine steps of movement in accordancewith the value of the key depressed.

Immediately to the rear of the drum 36 on the shaft 31 is a secondactuator drum 42 which is provided with a series of differential steppedteeth 43 which are adapted to cooperate with a second pair or' selectorgears (not shown) which are settable from a second row of keys by meansof a second set of selector bars (not shown) in exactly the same manneras the selector gears 30. Hence, for each row of keys provided on thekeyboard of the machine, there is provided a pair of selector bars. arelated pair of selector gears, a. square shaft 3l' and an actuator drumfor operating the selector gears. Inasmuch as two actuator drums areprovided on each actuator snaft 31, there need be only half as manyactuator shafts in the machine as there are banks of keys.

Slidably but non-rotatably mounted on the rear end of each square shaft3| is a spool 5U on the forward end of which is mounted a, tentcotliedadd gear 5| and on the rear end of which is mounted a ten-toothedsubtract gear 52. Lying in the space between the gears 5| and 52 is atransverse bail or gate 53 which extends across the machine and issupported at either end by arms 54 (only one shown) which are secured toa gate shaft 55 journalled between the side frames of the machine.

As described in Patent No. 2,229,889, the gate shaft 55 may be rockedeither clockwise or counter-clockwise so as to cause either the addgears 5| or the subtract gears 52 to be moved into mesh with a series often-toothed gears 56 mounted on the lower ends of a series of registerwheel shafts 51 which are journalled in suitable bearings provided in ahollow carriage frame bar 58. On the upper end of each shaft 51 is anumeral wheel 59 which has inscribed around the periphery thereof thenumerals "0 to 9 which may be viewed through an aperture 60 provided ina. carriage cover 5I. Each numeral wheel 59 is provided with a twrlerknob 62 which extends through a suitable aperture provided in the cover6| so as to enable the register wheel to be manually rotated to anydesired position where it will yieldably be retained by means of a starwheel 63 secured to the lower end of the shaft 51 which wheel iscontacted by a spring-pressed ball mounted in a bore provided in theframe bar 58.

Secured to either end of the carriage frame bar 58 is a carriage endframe 64 (Fig. 2) (only one shown), which end frames are connectedtogether at their forward ends by means of a guide rail 65. The framebar 58, end frames 64, and

Yguide rail 65 comprise the main framework of the shiftable registercarriage which is supported for endwise shifting movement on the machineframe. For this purpose, the cross bar 34 (Fig. 1) has secured thereto abearing rail 66 l which lies` beneath'l a lipy 61 formed ontheframe bar58 and thus servesv as a guide and a support for the rear end of theshiftable carriage. TheY guide rail 65Y which extends across the frontof the carriage is supported on and guided by aplu' rality of guiderolls 68 which' are rotatably jour'- nailed'v on a cross bar 69 whichissecured at either endto thef'sidefra-mesv of the machine. Hence, thecarriage and the register wheels may be shifted rela-tive tothespools 50so as' to change the` ordi-nal relationship between the register wheelsand the various` orders of the actuating mechanismy mounted in theframework' of the machine as desired. When the gate '3 is in its neutralposition, as shown in Fig. I, ordinal shift-- ing movements of thecarriage may be effectedwithout interferencev on the part of theadd-subtract gears 5|, 52 since inthis position" of thegate; the gears56v mountedY on thelowerL ends' of theA registerV wheel shafts 51 arefree to move through the space existing `betweenA the addsubtract gears.Means may be provided, as shown and described in U. S. Patent No;2,294,083, issued to Carl M. F. Friden on August 25, 1942, for shiftingthecarriage in either direction from one ordinal position tovanother'bypower drivenv means controlled either by a pair of manuallyoperable shift keysor by certain function controlled mechanisms whichare customarily provided in ma'- chines of this character.

Secured to each shaft 51, just above the gear 56, is a transfer' cam 1|which cooperates with a transfer lever 12. This lever' is` pivotallymounted in the frame bar 58 by means of a stud 13-which is secured tothe transfer lever and is journalled in a bore provided in the framebar. Each transfer lever 12 has formed thereon a bent-over ear 14 whichlies between a pair of flanges 15 formed on a hub 16 of a transfer gear11 which is slidably but non-rotatably'4 mounted on the square shaft 3|in the nextA higher order. Thel transfer gears 11 are each provided withten teeth and are each adapted to cooperate with a single tootlr18formed on a transfer actuator 19 mounted on each' of the` actuatorshafts 31. The transfer gears are yieldably maintained in either theirrearward or inactive positionsy or in their forward'or active positionsby means of detent pins 80-which are slidably mounted in the cross barr38k and' also in an auxiliary frame barl. f

Each pin 8|! is provided with a pair of iianges 82 which embrace aflange on its associated transfer gear so as to cause the pin 88 topartake of the slidingl movements of the transfer gear. The pins 80 aresuitably detented in either their forward or rearward positionsl bymeans` of spring-pressed balls (not shown) mounted in the cross bar 8|,each ball being adapted to engage with either one of a pair of notches(not shown) formed in the rear ends of the pins 80.

It will be seen from thev foregoing description that each time a numeralwheel passes fromr 9 to 0 or from 0 to 9 the cam 1|` will oscillatelitsassociated transfer lever 12 and cause the transfer gear 11 in the nexthigher order to be movedA into the path of theactuator`r tooth 18 forthat order. The gear 11 will be maintained in its forward position bydetent pin 80 until after the gear has been rotated one tooth space bythe tooth 18, after which the gear will be returned to its rearward orinactive position by means of a restoreA cam 83 mounted on the actuatorvshaft 31. The above-described mechanism, i. e., transfer y cams 1|,transfer levers 12, transfer gears 11 and transfer actuator teeth 18comprise what will hereinafter be referred to asthe conventi'cna1'-Aoi':

main transfer mechanism of the machine.

The calculating machine presently being described is provided with six`actuator shafts 31 and twelve square shafts 3| so that the twelfthnumeral wheel 59 from theright-hand end of the: register is normally thehighest order wheel to receive a transfer impulse from the main trans.-fer mechanism when the carriage is in. its leftmost or normal position.Hence, the first twelve orders of the register may bel considered tocom'- prise the inboard orders thereof when the carriage is' in itsnormal position, whereas all of the higher orders of the register may beconsidered as constituting 'the outboard orders of the register.However, if the carriage is shifted, say, two ordinal spaces to theright, then the thirteenth and fourteenth order wheels will lie Withinthe range of the main transfer mechanism and will now be included in theinboard group of wheels, whereas the wheels lying in the fifteenth andall higher orders will now constitute the outboard orders o theregister.

Means is provided for simultaneously resetting all of the numeral wheels59 to their 0 positions and for this purpose each shaft 51 is pro` videdwith a mutilated gear 84 which is adapted to cooperate with a resettingrack 85 which is mounted for longitudinal sliding movement; within theframe bar 58. This resetting mechanism is of conventional design and maybe similar to that shown and described in Patent No. 2,294,083, supra.As therein described, this mechanism may be either manually operated bymeansof' a resetting knob located on the right-hand end of the carriageor may be operated byfpower derived from one of the actuator shafts 31.

For the purpose of registering the number of cycles performed by themachine with the carriage located in any one of its various ordinalpositions, the shiftable carriage has mounted thereon a plurality ofnumeral wheels 8B which are viewable through a window 81 provided. inthecover 6| of the carriage. Each numeral wheel 86 is mounted on ahorizontal shaft Se which is journalled at its rear end in the frame bar58 and at its forward end in the guide rail 65. Also mounted on eachshaft 88 is an actuator gear-89 which is adapted to-be operated byarevolutions counter actuator 9e which is journalled in the frameworkA ofthe machine and serves to rotate numeral wheel 8E located incocperative-relationship with the lowest order of the actuator Si) onestep on each cycle of operation of the machine and also serves toperform the necessary transferring operations inthe higher order wheels86'. This mechanism is of conventional design and reference may be hadto Patent No. 2,229,889 for a detailed descriptionv thereof.

Auxiliary transfer mechanism In order to extend the transferring ofunits of one order of the register to the next higher order thereofbeyond the twelfth numeral `Wheel 59, the machine shown in theaccompanying drawings is provided with an auxiliary transfer mechanismwhich is located on the shiftable carriage and which enables transfersto be effected throughout the entire capacity of the register. l

As shown in Fig. 3, the register wheel shaft 51 in the twelfth order ofthe register has secured thereto a transfer tooth |00 (see also Fig. 5)which is adapted to engage with a single tooth |0| provided on adrive-transmitting transfer rack device |02. The rack device |02 is alsoprovided with a series of threeteeth |03 which lie in cooperativerelationship with a ten-toothed gear |04 secured to the register wheelshaft 51 in the thirteenth order of the register. As shown in Figs. 5and 6, a rack |02 is likewise provided between the fourteenth andfifteenth orders, between the sixteenth and seventeenth orders, and soon throughout the capacity of the register. Likewise, on each of theeven order register wheel shafts 51 above the twelfth order there isprovided a transfer tooth which is adapted to cooperate with the tooth|0| on its associated rack |02. On each of the register wheel shafts 51located in the uneven orders of the register, i. e., in the thirteenth,fifteenth, seventeenth, etc., orders, there is mounted a transfer' tooth|05 which lies opposite a single tooth |00 formed on adrive-transmitting transfer rack device |01 which racks are alsoprovided with a series of three teeth |03 which lie opposite transfergears |09 which are similar' to the gears |04 but are mounted on theshafts 51 located in the even orders of the register. Hence, the racks|01 serve to operatively couple the thirteenth and i'ourteenth orders ofthe register in driving relation for the transfer of a unit each timethe numeral wheel 53 in the thirteenth order moves from 9 to 0 or viceversa, and in a similar' manner serve to couple the fifteenth andsixteenth orders, the seventeenth and eighteenth orders, and so onthroughout the entire capacity of the register.

As shown in Fig. 3, the transfer teeth |00 and lie in differenthorizontal planes, as do also the racks |02 and |01, so as to enable theracks to overlap one another, as shown in Fig. 5, as is necessary inorder to provide for a connection between adjacent orders of theregister for transferring purposes.

As shown in Fig. 6, each rack |02 is provided with a pair of elongatedslots |13 which embrace a pair of headed studs ||4 which are secured toa slide ||5 which is mounted for sliding movement either toward or awayfrom the register wheel shafts 51 by means of headed studs ||6 which aremounted in an angle bracket ||1 which, as shown in Fig. 3, is attachedto the forward face of the frame bar 58 of the carriage. The slides H5are further guided by means of headed studs H0 which are mounted on thebracket ||1 and which cooperate with an openvended slot formed in therear edge of each ,of the slides H5. The slides ||5 are guided formovement on the studs I6 by means of a pair of elongated slots ||8, asshown in Fig. 6 of the drawings. Each slide I5 carries a stud H9 whichis received within an angularly disposed slot provided in an actuatingslide |2|. As shown `in Fig. 3, the slides |2| are of an angular crosssection and are slidably supported on an angle bracket |22 which, inturn, is secured to a carriage frame plate |23 which is supportedbetween the guide rail 65 and the carriage frame bar 58. The slides |2|are guided for endwise sliding movement on the bracket |22 by means of apair .The slides |3| are, in turn, guided for sliding movement eithertoward or away from the register wheel shafts 51 by means of headedstuds|33 which are secured to the frame plate |23 and cooperate with a pairof open-ended slots |34 provided in each slide |3|. Each of the slides|3| is further guided for rectilinear movement by means of a headed stud|35 which is mounted in the plate |23 and cooperates with an open-endedslot |36 provided in the rear edge of the slide I3 Secured to theunderneath side of each slide |3| is a stud |31 which is received withinan angular slot |38 provided in an actuating slide |39 which, like theslide |2|, is mounted for sliding movement on the bracket |22 by meansof a pair of headed studs |40 which are secured to the slide |39 andtravel within a slot |4| (see Fig. 4) provided in the bracket |22. Asshown in Figs. 3, 4 and 6, the vertically disposed portions of theactuating slides |2| and |30 lie in an abutting relationship so thatwhenever one of the slides |2| or |39 is moved toward the left, asviewed in Fig. 6 (right, as viewed in Fig. 4) all slides to left of theslide which is actuated will likewise vbe moved toward the left. Thus,each pair of adjacent slides |2 |39 constitutes a one-way-driveassembly, the lower order slide of which cooperates with the higherorder slide for driving the latter.

Whenever any of the slides |2| is moved toward the left by means of anactuating mechanism which will subsequently be described herein, theslot |20 (Fig. 6) in the slide will cause the stud ||9 on the slide ||5to be moved rearwardly, thereby causing the rack |02 to be moved towardthe rear so as to engage the teeth |03 on the rack with the teeth of thegear |04 and at the same time will cause the tooth |0| to be moved intothe path of the transfer tooth |00 secured to the register wheel shaft51 in the next lower order of the register. In this way the transferringconnection between the rack |02, the gear teeth |04, and the transfertooth |0| will be conditioned for operation. In a similar manner,whenever one of the actuating slides |39 is moved toward the left, asviewed in Figs. 5 and 6, the slot |38 on the slide will cause the stud|31 on the slide |3| to be moved rearwardly so as to carry the transferrack |01 toward the rear of the machine. The teeth |08 on the rack willthereby be brought into engagement with the teeth of the gear |09 and atthe same time the single tooth |06 on the rack will be moved into thepath Aof the transfer tooth |05 in the next lower order so as toeectively lcoupleV the two adjacent orders of the register for thetransfer of a unit from the lower order wheel to the higher order wheel.

It will be noted from the drawings that the racks |02 and |01 will belimited in their movement in either direction under the influence of thetransfer teeth |00 and |05 by the engagement of the ends of slots ||3and |32 with the studs ||4 and |30, respectively. The distance throughwhich the racks are permitted to move before the ends of the slotsengage with their respective studs is such as to cause the gears |04 and|09 to be rotatedthrough one tooth space, or lla of a revolution. Theracks are then positively stopped and hence the possibility of overthrowof the gears is absolutely eliminated.

As shown in Fig. 6 of the drawings, a slide member |45 is mounted forendwise sliding movement on the underside of the bracket |22 by means ofelongated slots |46 formed in the slide which cooperate with headedstuds |41 mounted in the bracket. The member |45 is provided with aformed-over extension |48 which bears 9 against the left-hand edge ofthe leftmost slide 2|. Hence, whenever any of the slides |2|, |39 aremoved toward the left, as viewed in Fig. 6, so as to move the racks I02, |01 into transferring position, the slide member |45 will likewisebe moved toward the left against the urgency of a spring |49 (Fig. 7)which normally maintains themember I 45 in its right-hand position. As

shown in Fig. 2 of the drawings, the member I4 5 is provided with anupstanding pin |50 which lies within a slot |5| provided in theleft-hand end of a slide |52 which is mounted for sliding movement onthe upper surface of the plate |23 by means of pin and slot connections|53. The slide |52 is urged toward the right, as viewed in Fig. v2, byak spring |54 and is provided with a pair of camming slots |55 whichcooperate with pins |56. mounted in a restoring slide |51 which ismounted for sliding movement on the plate |23 by means of pin and slotconnections |58 and |59. The slide |51 is connected at either end to arestoring plate |50 which, as shown in Fig. 6, is provided along itsrearward edge with a series of V-shaped notches |6| which are adapted tocooperate with pins |62 and |03 provided on the racks |02 and |01,respectively.

When the slide member |45 is moved toward the left, as viewed in Fig. 2,as the result of a left-hand sliding movement of the slides |2| and |39,the slide |52 will likewise be moved to the left and the slide |51 willbe moved toward the front of the carriage as the result of thecooperation between the slots |55 and pins |56. The notches IBI in therestoring plate |60 will thus bel moved away from the pinsl |62 and |53on the racks, therebyv freeing the racks for endwise shifting movementas they are moved rearwardly into transferring position. At the end-ofthe machine cycle, after the transfershave been. ef-

fected bymeans of the auxiliary transfer mechvided on the follower |1|.

dog |15 which is slidably mounted on the follower |1| by means of pinand slot connections |11. The upper end of the dog |16 is formedover, asshown in Fig. 9, so as to extend toward the rear of the machine where itis provided with an upstanding nose |18 which, in the normal position ofthe dog, liesl directly beneath rolls |19 and |80 (see also Fig. 4)which are mounted on the slides |2| and |39, respectively.

As shown in Fig. 10, the dog |15 is normally maintained in its raisedposition with respect to the follower |1| by means of a pivoted latch|8| which is rotatably journalled on a stud |82 secured to the follower|1|. The 1atch is provided with a shoulder |03 which normally liesbeneath an ear |84 formed on the lower end of the dog s0 as to maintainthe dog in its elevated position against the urgency of a spring |85which is tensioned between the ear |84 and an ear |86 pro- The spring|85 bears against a roll |81 on the latch so as to urge vthe latch torotate in a vcounter-clockwise direction as viewed in Fig. 10, therebyurging the shoulder |83 into position beneath the ear |84.

The operation of the driving dog is best illustrated in Fig. 11, whereinthe dog is shown both in its normal or full-cycle position and in threedifferent moved positions. As therein shown, cam |10, follower |1|, dog|15, nose |18- and latch |8| are shown in full lines in the positionsthey occupy in the full-cycle position of the machine. The positionoccupied by the nose |18 at this time is indicated by the letter A. Theone-quarter cycle position of the nose |10 (i. e., the position itoccupies after the square cam has rotated 90 in a counter-clockanisxn,the slides 2| and |39 will. be released,

whereupon the spring |49 (Fig. 7) will restore the slids to theirinitial positions and the pin |50 in slide member |45 will release theslide |52 for right-hand movement underA the indu-ence of its spring|54, whereby the restoring plate |50 will be returned to its normal orrearward position. As the plate |50 moves rearwardly, the notches |6|therein will engage with any of the studs |62 or |63 which have beenmoved to one r side or the other of their normal positions and returnthe pins and their related racks to their normal positions, therebyplacing the auxiliary transfer mechanism in readiness for anothertens-transferring operation.

Driving mechanism for auxiliary transfer mechanism tened on a framecrossbar |15 which extends between the side frames of the machine.Hence, on each cycle of the calculating machine, the cam follower |1| isgiven a substantial'y rectangular pattern of movement. This movement isutilized to operate the slides |2| and |39 by means of a wise direction)is indicated at B in Fig. 11. At the end of 180 of movement, the lobe onthe cam |10 will be located to the right of the shaft 31 and the nose|18 will be in the position marked C. At the end of 270 of rotation, thelobe on the cam will be located above the shaft 31 and the nose |18 willbe in the position marked D. During the last 90 of movement of the shaftS1, the cam |10 will move to a position (fullcycle) where it lies to theleft of the shaft 31 and near the endl of this last portion of therotation of the shaft 31, a tripping nose |88 provided on a cam |89secured to the shaft 31 will engage with a finger |99 on the latch |8|so as to remove the shoulder |83 from beneath the ear |84 and permit thespring |85 to pull the dog |85 downward as shown in Fig. 11 so as toremove the nose |18 from the path of the rolls |18 and |80. Downwardmovement of the dog |10 is limited by a forked extension |9| providedthereon which engages over the cross bar |15 and bears against the topof this bar so as to limit downward movement of the dog. As shown inFig. 10, thev cross-bar |15 is provided on its upper edge with a notch|92 which is provided at its right-hand end with an inclined surface|93. When the nose |18 is in position A, the forked extension |9| bearsagainst the bottom of the notch and the nose |18 is thereby permitted toassume a completely retracted position with respect to the rolls |19 and|00. es the linger moves from A to B, the

extension |9| rides up the surface |93 and regains the upper edge of thebar as shown in Fig. 10. Y

The vlatch 58| will be permitted to re-engage with the ear |84 on thedog during the first 90 of movement of the cam |10 on the nextsucceeding cycle of the machine when the follower |1| will be moveddownwardly to its lowermost position, thereby carrying the latch down toa point where the shoulder |83 moves below the ear |84 and is re-engagedtherewith by the spring |85. As the cycle continues, the nose |13 willbe moved from the position B to the position C where it will move upbehind a roll |19 or |80, then to the position D where it will force theroll and its associated slide to the left and then, near the end of thecycle, will be caused to drop down out of the path of the roll by theaction of the nose |88 acting on the nger |90 of the latch.

The release of the dog |16 by the latch |8|, toward the end of themachine cycle, is necessary in order to obtain a quick return of thenose |18 at the very end of the cycle so that it will lie out of thepath of the rolls |19 and |80 at the conclusion of the machine cycle.

Aumiliary transfer mechanism disabled during division On divisionoperations of a machine of the type herein shown and described, theoperation of the auxiliary transfer mechanism is unnecessary due to theright-hand shifting of the carriage during division to such a positionas to bring the highest digit of the dividend in the accumulator intoalignment with the highest digit of the divisor on the keyboard. It istherefore desirable in division operations to disable the auxiliarytransfer mechanism so that it will not be unnecessarily subjected to thewear and tear which would otherwise occur during division.

For this purpose, the division control shaft 200 (Figs. 8 and l0) of thecalculating machine, which shaft corresponds to shaft 228 shown in U. S.Patent No. 2,327,981, issued to Carl M. F. Friden on August 3l, 1943, isprovided at its left-hand end with a forwardly directed arm 20! which,as shown in Figs. 9 and 10, is arranged to cooperate with a finger 202provided on the latch 8|. Hence, when the shaft 200 is rocked clockwise,as Viewed from the right-hand side of the machine, at the outset of adivision operation and is maintained in this position by theconventional automatic control mechanism of the calculating machineuntil the conclusion of the division problem, the arm 20| will be liftedand will act on the finger 202 in such a manner as to rotate the latch|8| clockwise, as viewed in Fig. 10, thereby preventing relatching ofthe dog |16 with the cam follower |1| during the first 90 of each cycleof operation of the machine as described above. Hence, the nose |18 willfail to be elevated by the follower as the cam revolves, and thereforewill not engage with the rolls |19 and |80 for the purpose of enablingthe auxiliary transfer mechanisrn.

Gperation The operation of the previously-described auxiliary transfermechanism is as follows:

In calculating machines of the type herein shown and described. thetransfer of a unit into the twelfth order wheel of the register by themain transfer mechanism of the machine does not occur until near theconclusion of the machine cycle. Hence, it is unnecessary to prepare theauxiliary transfer mechanism in the carriage for the transfer of unitsfrom the twelfth to the thirteenth orders, and so on, until near the endof the cycle. Accordingly, as

12 shown in Fig. 1l, the nose |18 need not act on the rolls |19, untilthe last part of the cycle, this action occurring as the nose moves fromthe position C to D, or somewhere between and 270.

When the register is in its leftmost or normal position, the roll |19 onthe rightmost slide I2| will lie just above the nose |18 as shownin.Fig. 10. When the machine is cycled, the nose |18 will move, ashereinabove described, so as to engage the roll |19 and move the slide|2| and all other slides |2| and |39 to the left of it toward the leftend of the carriage so as to cause the racks |02 and |01 to be movedrearwardly into operative position with respect to the transfer teeth|00 and |05 and transfer gears |04 and |09 mounted on the register wheelshafts. Hence, if a. unit is entered by the main transfer mechanism intothe twelfth order wheel of the register and if this wheel is located atthe transfer point, the tooth |00 in this order will engage the tooth|0| on the rack |02 associated therewith and shift the rack toward theright if the transfer is in an additive direction, or toward the left incase of a subtractive entry. The teeth |03 on the rack will therebycause the gear |04 on the thirteenth order register wheel to be movedone step in a similar direction, whereupon the transfer tooth |05 in thethirteenth order will be moved one step and, if the thirteenth orderwheel is at the transfer point, will engage with the tooth |06 on therack |01 and cause this rack to be shifted either to the right or to theleft, as the case may be, so as to cause the transfer of a unit into thefourteenth order wheel. This action will be continued throughout thecapacity of the register until an order is reached wherein the registerwheel is not at a transfer point whereupon the transferring action willcease.

Left-hand shifting movement of the leftmost slide |2| will, aspreviously described, cause the restore plate |60 to be moved forwardly,thereby releasing the pins |62 and |63 on the racks |02 and |01,respectively, from the restraining lnuence of the notches |6|. When thenose |88 (Fig. 10) trips the latch |8| near the end of the cycle, thenose |18 will drop down away from the roll |19 and permit the spring |49(Fig. '1) to return the slides |2| and |39 toward the right and alsopermit the spring |54 to return the restore plate |60 into its rearwardposition where the notches |6| will engage pins |62 and |63, therebyrestoring the racks |02 and |01 to their central or normal positions. Onthe next cycle of operation of the machine, the cam follower |1| willmove downwardly to the position shown in Fig. 10, whereupon the latch|8| will re-engage the dog |16 and cause the dog to be carried alongwith the follower |1| so as to engage the roll |19 and again conditionthe auxiliary transfer mcchanism for operation.

In the event that the register carriage is shifted to the right so as tobring the higher order wheels of the register inboard of the machine,the auxiliary transfer mechanism in those orders which lie within therange of the main transfer mechanism will remain inactive inasmuch asthe rolls |19 and |80 on the slides |2| and |39 in these orders will lieto the right of the nose |18 and therefore will not be shifted to theleft during the machine cycle for the purpose of engaging the associatedracks |02 and |01 with the transfer teeth and transfer gears mounted onthe register wheel shafts 51.

Whenever the machine is conditioned for a division operation, the shaft200 will be rocked 13 and the arm 320i thereon will cam the latch IBIclockwise so asr to disable the dog |16 and render the auxiliarytransfer mechanism inoperative throughout the division operation.y

We claim:

1. In a cyclically operable calculating machine having affra'me,a-carriage .mounted for endwise shifting `movement-on. said frame. and aplurality of ordinally arranged register wheels journalled in saidcarriage, certain of said wheels lying inboard of said frame and othersof said wheels lying outboard thereof when said carriage is in its endposition, the combination o f a main transfer mechanism situated withinsaid frame for effecting transfers in the inboard register wheels; andan auxiliary transfer mechanism mounted on said carriage for effectingtransfers in the outboard register wheels, said last-named mechanismcomprising a transfer tooth connected for movement with the highestorder inboard wheel, a transfer gear and a transfer tooth connected formovement with each of the outboard register wheels, a series ofdrive-transmitting racks associated respectively with each of saidtransfer teeth and the transfer gear in the next higher order of theregister, means mounting each of said racks for sliding movementselectively to a normal ineffective position in which said rack isincapable of meshing with the associated transfer tooth and transfergear irrespective of the values standing in said register, and to aneffective position in which said rack is meshed with the associatedtransfer gear and is conditioned to be engaged by the associatedtransfer t-ooth when a transfer from the lower order to the higher orderis called for by a value-entering operation, whereby power availablefrom novement of the register wheel in said lower order will act throughsaid rack to effect transferring movement of the next higher orderregister wheel, and means for sliding those of said racks which areassociated with outboard register wheels from ineffective to effectivepositions.

2. A calculating machine as dened in claim 1 including means forlimiting the sliding movement of said racks to a predetermined extent soas to prevent overthrow of the register wheels during transferringoperations.

3. A calculating machine as defined in claim 1 wherein said engagingmeans includes a plurality of ordinally arranged racks on said carriaee,there being one such rack for each outboard order of said register, anda cyclically operable actuator mounted on said frame for operating saidracks on each cycle of operation of the machine so as to cause saidracks to be engaged and said auxiliary transfer mechanism to be renderedeffective.

4. A calculating machine as defined in claim 3 wherein each pair ofadjacent racks constitutes a one-way-drive assembly the lower order rackof which cooperates with the higher order rack of which, wherebyoperation of any one of said racks by said actuator causes all higherorder racks to be operated.

5. A calculating machine as defined in claim 4 wherein said actuator andsaid racks are so positioned relative to one another as to cause therack associated with the lowest outboard order to be operated on eachVcycle of operation of the machine whereby, regardless of the position ofthe carriage, only those racks associated with the outboard orders ofthe register will be operated.

6. In a cyclically,operable calculating machine "14 having ai frame, acarriage mounted for-.endwise shifting movement on saidy frame, and aplurality of ordinally arranged: register wheels `.iournalled in saidcarriage, certain of said wheels: lying inboard off said frame andothers; of said wheels lying outboard thereof when said carriage is inits endv position, the combination of a main transfer mechanism situatedwithin said frame for effecting transfers in the-inboardregister Wheels;and an auxiliaryitransfery mechanismvmounted on said carriage. forrveffecting transfersv inl the outboard register wheels, said last-namedmechanism comprising a transfer tooth connected for movement with thehighest order inboard wheel., a transfer gear and a transfer toothconnected for movement with each of the outboard register wheels, aplurality ofordinally arranged elements mounted on said carriage formovement either toward or away from said transfer gears and transferteeth; and a rack mounted for endwise sliding movement on each of saidelements, said racks being arranged for movement tangentially of saidtransfer gears and transfer teeth whereby said racks may be engaged withsaid transfer gears and transfer teeth upon movement of said elementstoward said gears and teeth and transfers may be effected betweenadjacent register wheels by endwise sliding movement of said racks underthe iniiuence of said transfer teeth.

7. The invention as recited in claim 6 wherein means is provided forlimiting the endwise sliding movement of said racks to a predeterminedextent whereby overthrow of the register wheels in transferringoperations is positively prevented.

8. The invention as recited in claim 6 wherein said racks are normallydisengaged from said transfer gears and transfer teeth and means isprovided for causing said elements to be moved toward said gears andteeth in each cycle of operation of the machine.

9. The invention as defined in claim 8 wherein said last-named meansincludes a cyclically operable actuator mounted on said frame.

10. The invention as defined in claim 9 including means for causing allelements associated with higher order register wheels to be moved towardsaid transfer gears and transfer teeth whenever an element associatedwith a lower order register wheel is caused to move toward said gearsand teeth by said actuator.

1l. The invention as dened by claim 10 wherein said actuator is solocated in said frame as to cause the element associated with the lowestoutboard order to be operated on each cycle of operation of the machinewhereby, regardless of the position of the carriage, only those elementsassociated with the outboard orders of the register will be moved towardthe transfer gears and transfer teeth. 12. In a cyclically operablecalculating machine having a frame, a carriage mounted for endwiseshifting movement on said frame, a plurality of ordinally arrangedregister wheels in said carriage, certain of said wheels lying inboardof said frame and others of said wheels lying outboard thereof when thecarriage is in its end position, the combination of a main transfermechanism situated within said frame for effecting transfers in theinboard register wheels; and an auxiliary transfer mechanism mounted onsaid carriage for effecting transfers in the outboard register wheels,said last-named means including a transfer tooth connected for movementwith the highest order inboard wheel, a transfer gear and a transfertooth c-onnected for movement with each of the outboard register Wheels,a series of slidable racks 15 16 for operatively connecting eachtransfertooth REFERENCES CITED with the transfer gear in the next higher orderThe following references are of record in the of the register, means forengaging and disengagme of this patent: i ing said racks and saidtransfer gears and transfer teeth on each cycle of operation of said 5UNITED STATES PATENTS machine, and means operated by said last-namedNumber` Name Dare means for restoring any displaced racks to their2,089,770 Suter et a1. Aug. 10, 1937 initial positions as they are beingdisengaged 2,403,069 Friden et al. July 2, 1946 from said transfer gearsand transfer teeth. 2,420,607 Mendeehn May 13, 1947 13. The invention asdefined by claim 12 where- 10 in said racks are mounted for movementfrom an initial position to either one of two displaced positions andare restored to their initial positions from either of said displacedpositions by said restoring means.

GEORGE W. HOPKINS. JON E. GROBL.

